Articles | Volume 14, issue 9
Geosci. Model Dev., 14, 5751–5768, 2021
https://doi.org/10.5194/gmd-14-5751-2021
Geosci. Model Dev., 14, 5751–5768, 2021
https://doi.org/10.5194/gmd-14-5751-2021

Development and technical paper 16 Sep 2021

Development and technical paper | 16 Sep 2021

Incorporation of volcanic SO2 emissions in the Hemispheric CMAQ (H-CMAQ) version 5.2 modeling system and assessing their impacts on sulfate aerosol over the Northern Hemisphere

Syuichi Itahashi et al.

Data sets

OMI/Aura Sulfur Dioxide (SO2) Total Column L3 1 day Best Pixel in 0.25 degree x 0.25 degree V3 Can Li, Nickolay A. Krotkov, and Peter Leonard https://doi.org/10.5067/Aura/OMI/DATA3008

Model code and software

CMAQ (Version 5.2) United States Environmental Protection Agency https://doi.org/10.5281/zenodo.1167892

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Short summary
The Community Multiscale Air Quality (CMAQ) modeling system extended for hemispheric-scale applications (H-CMAQ) incorporated the satellite-constrained degassing SO2 emissions from 50 volcanos across the Northern Hemisphere. The impact on tropospheric sulfate aerosol (SO42−) is assessed for 2010. Although the considered volcanic emissions occurred at or below the middle of free troposphere (500 hPa), SO42− enhancements of more than 10 % were detected up to the top of free troposphere (250 hPa).